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litmuses

 - 4 dictionary results

lit⋅mus

  [lit-muhs]
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–noun
a blue coloring matter obtained from certain lichens, esp. Roccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator.
Origin:
1495–1505; earlier lytmos < ON litmosi dye-moss, equiv. to lit- color, dye + mosi moss
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Medical Dictionary

Main Entry: lit·mus
Pronunciation: 'lit-m&s
Function: noun
: a coloring matter from lichens that turns red in acid solutions and blue in alkalinesolutions and is used as an acid-base indicator
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

litmus lit·mus (lĭt'məs)
n.
A water-soluble blue powder derived from lichens that changes to red with increasing acidity and to blue with increasing basicity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
litmus   (lĭt'məs)  Pronunciation Key 
A colored powder, obtained from certain lichens, that changes to red in an acid solution and to blue in an alkaline solution. Litmus is a mixture of various closely related heterocyclic organic compounds. ◇ Litmus is typically added to paper to make litmus paper, which can be used to determine whether a solution is basic or acidic by dipping a strip of the paper into the solution and seeing how the paper changes color.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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